Single-level cat play structure



FIG. 1 is a perspective view of a single-level cat play structure showing the top, front and right side of the new design thereof;

FIG. 2 is a right side elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a front elevation view thereof; and,

FIG. 5 is a rear elevation view thereof. 

What is claimed is the ornamental design for a single-level cat play structure, as shown and described. 